Quoting A&J. ♥:" could you tell me exactly which one you use? how often you do it? also I read somewhere you're not supposed ... [snip!] ... somewhere you're not supposed to keep using the same one or something because it's unsanitary and you could get an infection"
I use a 1.5mm roller on my stomach, you can buy any brand but mine are made by Clinical Resolution. They are made for multiple use but you do need to sanitize it with alcohol before and after each use and also wash it with soap and water after each use. You are not supposed to share them with anyone else but you can use them on yourself up to a year (I believe). They come pre-sterilized and wrapped in sterile packaging. They also come with a case to hold them in to help keep them clean.
I do my stomach every 3wks, They recommend spacing out treatments with the 1.5mm roller to every 3-4wks to allow the skin to fully repair before you go back and roll over it again.
Basically you roll over each part of your skin 8x in each direction (so up, down, side to side and then at angle going up and then an angle going down). Then you cover it with pure vitamin oil, either A, C or E (or a combination of those).